He placed his fingers on the propeller hub then ran them out along the blades.

A thirty-millimeter cannon is mounted on the front propeller hub.

The order came after several propeller hubs broke in flight in recent years.

Further metallic objects, including the propeller hub, were excavated and removed from the site.

"Here on the nose is a propeller hub.

A new propeller hub was made that mounted six standard VISh-61 blades, but nothing more is known of the project.

To cover and streamline the propeller hub.

One of the four five-foot blades on the left propeller hub was broken off 16 inches from the hub.

The regulations instruct pilots to look for signs of ice accumulating on windows, wings or propeller hubs.

These were similar to the D-11, but featured Motorkanone nose cannons firing through the propeller hub.

The most important feature is the hollow propeller hub which directs air into a passage in each propeller blade.

The engines were reliable but rather sensitive to low temperature, so the Soviet engineers developed special covers for keeping propeller hubs from freezing up.

Aircraft armed with a 20 mm cannon firing through the propeller hub - instead of two nose-mounted machine guns - received the designation D.501.

From the spinner enclosing the propeller hub to the rear tips of the elevators, the entire machine was painted a bright and flamboyant yellow.

A spinner is an aircraft component, a streamlined fairing fitted over a propeller hub or at the centre of a turbofan engine.

Due to lubrication and galling problems with the propeller hubs' variable pitch mechanisms, the aircraft needed servicing in Hawaii.

At the front of the cowls, the engines were also fitted with a two stage "impeller fan" directly behind the propeller hub and prop spinner.

A cruciform empennage was carried on an open truss of triangular cross-section, the upper longeron of which passed through the propeller hub.

Propeller hubs were taken from F4U Corsairs, four-blade propellers and spinners from DC-7s.

When the crew then retards the throttle levers, electric mechanisms in the propeller hub rotate the blades to a position in which they will provide reverse thrust.

The propeller hub is usually attached directly to the crankshaft, but there is at least one example of a sustainer with a belt reduction drive, the DG-1000T.

This was fitted with sensors that would detect hits, and these hits were signaled by illuminating a light in the propeller hub where the cannon would have been.

They were variously mounted, often in the wings, but also high on the forward fuselage, where they would fire through the propeller, or even through the propeller hub.

The splined or other non-circular cross section of the sleeve inserted between the shaft and propeller hub transmits the engine torque to the propeller, rather than friction.